stack created HBASE-15366: ----------------------------- Summary: Add doc, trace-level logging, and test around hfileblock Key: HBASE-15366 URL: https://issues.apache.org/jira/browse/HBASE-15366 Project: HBase Issue Type: Sub-task Components: BlockCache Reporter: stack Assignee: stack
What hfileblock is doing -- that it overreads when pulling in from hdfs to fetch the header of the next block to save on seeks; that it caches the block and overread and then adds an extra 13 bytes to the cached entry; that buckets in bucketcache have at least four hfileblocks in them and so on -- was totally baffling me. This patch docs the class, adds some trace-level logging so you can see if you are doing the right thing, and then adds a test of file-backed bucketcache that checks that persistence is working. -- This message was sent by Atlassian JIRA (v6.3.4#6332)